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The United States has no such system. Neither residents nor foreign travelers are required to register their address with anyone when in the US.

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Not sure if the law changed, but for the 12 years I was on student (F1) and then work (H1) visa I had to notify INS if I changed of address. If you are traveling internationally frequently there was no need to separately inform them because you would do it on your entry form, but I've had to send a special form once when I moved and wasn't planning to travel for a while. This was about 10 years ago so things might have changed.

Strange. Every time I've visited the US I've had to specify at immigration where I'd be staying...

Entering the US requires an initial contact address on the arrival form. Once in, you can then go stay whereever you like, without any further address registration update requirement.

This is as opposed to Russia and China, where foreigners are required to notify the government of every address they ever stay at.

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